Patents by Inventor Sutarno

Sutarno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Kapok loudspeaker enclosure damping material
    Patent number: 6338395
    Abstract: A damping material for use in a loudspeaker enclosure to enhance sonic properties of the enclosure. The material for use in the enclosure is kapok, a fibrous material with a relatively low density. By incorporating the kapok within the enclosure, either standing alone or in combination with other materials known to function as acoustic dampers, the overall result is that the sonic quality of the speaker system is increased and may also be reduced in size without sonic compromise.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: January 15, 2002
    Assignee: P.T. Hartono Istana Electronics
    Inventors: J. Dwidjaja Setiabudi, Adisusanto, Setiawan Yusran, Nafis Dwi CW, Sutarno